A New Zinc(II) Coordination Polymer Based on 5-Methylisophthalic Acid and 4,4′-Dipyridylsulfide: Synthesis, Structure, and Photoluminescent Properties

Abstract

The use of both 5-methylisophthalic acid (H₂mip) and 4,4′-dipyridyldisulfide (dpds) with Zn(II) ion under hydrothermal conditions has provided a new zinc(II) coordination polymer, [Zn(mip)(dps)]_n (1), and it has been characterized by elemental analysis, FT-IR spectroscopy, and X-ray single-crystal diffraction. The starting reagent dpds ligand was converted to dps (4,4′-dipyridylsulfide) in the resulting complex. It crystallizes in monoclinic space group P2₁/n with a = 12.0091(12), b = 10.9122(11), c = 13.4699(14) Å, β = 95.1890(10)°, C₁₉H₁₄N₂O₄SZn, M_r  = 431.75, V = 1757.9(3) ų, Z = 4, μ = 1.545 mm^-1, D_c  = 1.631 g·cm^-1, F(000) = 880, R = 0.0380, wR = 0.1050 (I > 2σ(I)). The title complex has a 3-D 4-fold interpenetrating diamondoid network with (6⁶) topology. Photoluminescence measurements show that 1 has medium fluorescent emissions at 458 nm and 543 nm upon excitation at 322 nm.

Keywords:

• 4,4′-dipyridylsulfide
• 5-methylisophthalic acid
• photoluminescent properties
• zinc(II) complex

Acknowledgments

This work was supported by the Natural Science Foundation of Henan province (122102310455), the Natural Science Foundation of Henan Province Educational Committee (12B150019), and the Youth Foundation of Luoyang Normal University (2011-QNJJ-003).